Abstract
Purpose
Traditional endoscopic endonasal approaches to the cavernous sinus (CS) open the anterior CS wall just medial to the internal carotid artery (ICA), posing risk of vascular injury. This work describes a potentially safer midline sellar entry point for accessing the CS utilizing its connection with the inferior intercavernous sinus (IICS) when anatomically present.
Methods
The technique for the midline intercavernous dural access is described and depicted with cadaveric dissections and a clinical case.
Results
An endoscopic endonasal approach exposed the periosteal dural layer of anterior sella and CS. The IICS was opened sharply in midline through its periosteal layer. The feather knife was inserted and advanced laterally within the IICS toward the anterior CS wall, thereby gradually incising the periosteal layer of the IICS. The knife was turned superiorly then inferiorly in a vertical direction to open the anterior CS wall. This provided excellent access to the CS compartments, maintained the meningeal layer of the IICS and the medial CS wall, and avoided an initial dural incision immediately adjacent to the ICA.
Conclusion
The midline intercavernous dural access to the CS assisted by a 90° dissector-blade is an effective modification to previously described techniques, with potentially lower risk to the ICA.
Abbreviations
- AICS:
-
Anterior intercavernous sinus
- CCL:
-
Caroticoclinoidal ligament
- CN:
-
Cranial nerve
- CS:
-
Cavernous sinus
- ICA:
-
Internal carotid artery
- IICS:
-
Inferior intercavernous sinus
- IPL:
-
Inferior parasellar ligament
- MR:
-
Magnetic resonance
- PG:
-
Pituitary gland
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Funding
This work was supported in part by funds from the Johnson Endowed Professorship and Joseph and Barbara Ashkins Endowed Professorship in Surgery.
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Conceptualization: Maria Peris-Celda, Carlos Pinheiro-Neto; methodology: Maria Peris-Celda, Rima Rindler; formal analysis and investigation: Rima Rindler, Luciano Leonel, Edoardo Agosti; writing—original draft preparation: Rima Rindler, Panagiotis Kerezoudis, Stephen Graepel; writing—review and editing: Maria Peris-Celda, Carlos Pinheiro-Neto; funding acquisition: Maria Peris-Celda; resources: Luciano Leonel, Edoardo Agosti, Stephen Graepel; supervision: Maria Peris-Celda, Carlos Pinheiro-Neto.
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Approval was obtained from the ethics committee of the Mayo Clinic. The procedures used in this study adhere to the tenets of the Declaration of Helsinki.
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The authors declare no competing interests.
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This article is part of the Topical Collection on Neurosurgical Anatomy
Previous presentations: This work was accepted as an oral presentation at the 31st North American Skull Base Society meeting in February 18–20, 2022, Phoenix, AZ.
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Supplementary file1 (MP4 31277 KB) Intraoperative video demonstrating the midline endoscopic endonasal inferior intercavernous sinus approach for biopsy of a lesion in the left cavernous sinus.
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Rindler, R.S., Leonel, L.C., Graepel, S. et al. The endonasal midline inferior intercavernous approach to the cavernous sinus: technical note, cadaveric step-by-step illustration, and case presentation. Acta Neurochir 164, 2573–2580 (2022). https://doi.org/10.1007/s00701-022-05284-w
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DOI: https://doi.org/10.1007/s00701-022-05284-w